[citation needed] After winning an Offaly Minor Championship with Drumcullen as a 15-year-old in 1949, he was later drafted onto the club's junior and senior teams as goalkeeper.
[citation needed] Drumcullen lost back-to-back finals over the following two years but claimed the title once again in 1957, with Molloy collecting a second winners' medal after the 10-07 to 1-03 victory over Shannon Rovers.
[citation needed] Three-in-a-row proved beyond Drumcullen, however, the club reached the 1961 final with Molloy serving as captain of the team.
[citation needed] On 24 April 1966, Molloy was selected at right corner-forward when Offaly faced Kerry in the Division 2 final of the 1965–66 National League.
At the time of his retirement from inter-county hurling he was the third highest scorer in Leinster Championship history behind Eddie Keher and Nicky Rackard.
[citation needed] After being omitted from the team on a number of occasions, Molloy was included on the starting fifteen as left wing-back during the 1965 Railway Cup.